《环境空气气态汞的测定金膜富集冷原子吸收分光光度法》(HJ 910—2017)修改单
《环境空气气态汞的测定金膜富集/冷原子吸收分光光度
法》（HJ910—2017）修改单
一、将“1适用范围”第三段“当采样体积为60L（60min，标准状态）时，方法检出限为2ng/m3，测定下限为8ng/m3；当采样体积为1440L（24h，标准状态）时，方法检出限为0.1ng/m3，测定下限为0.4ng/m3。”修改为：
“当采样体积为60L（60min）时，方法检出限为2ng/m3，测定下限为8ng/m3；当采样体积为1440L（24h）时，方法检出限为0.1ng/m3，测定下限为0.4ng/m3。”
二、将“9.1结果计算”及其内容修改为：
“9.1结果计算
环境空气中气态汞的质量浓度按公式（1）计算：
（Hg）= ×1 r（1）式中：ρ（Hg）——环境空气中气态汞的浓度，ng/m3；
W——样品富集管中测得的汞含量，ng；
V r——参比状态（298.15K，1013.25hPa）下的采样体积，L。”
三、将“9.2结果表示”及其内容修改为：
“9.2结果表示
当采样体积为60L（60min），测定结果小于100ng/m3时，保留至整数位；测定结果大于等于100ng/m3时，保留3位有效数字。
当采样体积为1440L（24h），测定结果小于10.0ng/m3时，保留小数点后1位；测定结果大于等于10.0ng/m3时，保留3位有效数字。”
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Lesson 9 “A More Perfect Union” (Part Ⅰ) 一、词汇短语 1. improbable adj. not likely to be true or to happen不可能的 2. persecution n. the state of treating someone cruelly or unfairly over a period of time, especially because of their religious or political beliefs 迫害 3. stalemate n. a situation in which it seems impossible to settle an argument or disagreement, and neither side can get an advantage 僵局，僵持 4. embed v. to fix something firmly into a substance or solid object 使插入，使嵌入 5. parchment n. a substance made from animal skin, used in the past for writing on; a document, manuscript, or diploma on parchment （用于书写正式文件的）仿羊皮纸；毕业文凭 6. obligation n. the state of being forced to do something because it is your duty, or because of a law, etc.义务，职责， 债务 7. unyielding adj. if a person is unyielding, they are not easily influenced and they are unlikely to change their mind坚强的，不屈的， 执着的
全国计算机一级考试复习.doc
1. __________________________________ 假设给定一个十进制整数D,转换成对应的二进制整数B,那么就这两个数字的位数而言，B与D相比， ___________________________ o A?B的位数大于D；B?D的位数大于C. B的位数 大于等于D； D. D的位数大 于等于B； 2.在计算机内部用来传送、存储. _____ 形式进行的。 A?十进制码 B.二进制码 十六进制码 3.磁盘上的磁道是_____ o A.一组记录密度不同的同心圆圆 C.-条阿基米德螺旋线 4?下列关于世界上第一台电子计算机EN1AC的叙述中，___ 是不 正确的。 A.EMAC是1946年在美国诞生的 B.它主要采用电子管和继电器 C.它首次釆用存储程序和程序控制使计算机自动工作 D?它主要用于弹道计算 5.用高级程序设计语言编写的程序称为o A.源程序 B.应用程序 C.用户程序 D.实用 程序 6.二进制数011111转换为十进制整数是 ______ 。 A.64 B. 63 C.32 D. 31 7 ?将用高级程序语言编写的源程序翻译成目标程序的程序称 A.连接程序 B.编辑程序 C.编译程序 D. 诊断维护程序 8. ___________________________ 微型计算机的主机由CPU、 _______________________________ 构成。 A.RAM B. RAM. ROM和硬盘 C. RAM和ROM D.硕盘和显示器 9.十进制数101转换成二进制数是______ 。 A.01101001 B. 01100101 C.01100111 D. 01100110 10.下列既属于输入设备又属于输出设备的是 ____ 。 A.软盘 B. CD-ROM C.显示器 D.软盘驱动器 11.已知字符A的ASCII码是01000001B,字符D的ASCII码是_ 。 A.01000011B B. 01000100B C.01000010B D.01000111B 12.多媒体计算机处理的信息类型有 ____ 。 A.文字，数字，图形 B.文字,数字,图形,图像,音频, 视频 C.文字，数字，图形，图像D?文字，图形，图像，动画 13.1MB的准确数港是____ 。 A.1024 X1024 Words B. 1024X1024 Bytes C. 1000 X1000 Bytes D. 1000 X1000 Words 14. 3. 5英寸双面高密盘片的存储容量为____ 。 A.720 KB B. 1.2 MB C. 1. 44 MB 0. 2. 8 MB 15.一个计算机操作系统通常应具冇 ____ o A.CPU的管理;显示器管理;键盘管理;打印机和鼠标器管理等五 大功能 B.硕盘管理；软盘驱动器管理；CPU的管理；显示器管理和键盘管 理等五大功能 C.处理器(CPU)管理;存储管理;文件管理;输入/出管理和作业管理 五大功能 D.计算机启动；打印；显示；文件存取和关机等五大功能 16?下列存储器屮，属于外部存储器的是_____ o A.ROM B. RAM C. Cache D.硬盘 17.在系统软件中，操作系统是鼓核心的系统软件，它是______ 。A.软件和(i更件Z间的接口 B.源程序和FI标程序Z间的 接口 C.用户和计算机之间的接口 D.外设和主机之间的接口18?计算机系统山______ 两大部分组成。 A.系统软件和应用软件 B.主机和外部设备 C.硬件系统和软件系统 D.输入设备和输出设备 19?下列叙述中，错误的一条是_____ o A.计算机硬件主要包括:主机.键盘.显示器.鼠标器和打印 机五大部件 B.计算机软件分系统软件和应用软件两人类 C.CPU主要由运算器和控制器组成 I).内存储器中存储当前正在执行的程序和处理的数据 20?常丿IJ的3. 5英寸软盘角上有一带黑滑块的小方口，当小方口被 打开时，其作用是_____ o A.只能读不能写 B.能读乂能写 C.禁止读也禁止写 D.能写但不能读 21.下列存储器中，属于内部存储器的是____ 。 A.CD-ROM B. ROM C.软盘 D.硬盘 22.目前微机中所广泛采用的电子元器件是。 A.电子管 B.晶体管 C.小规模集成电路 D.大规模和超大规模集成电路 23?根据汉字国标GB2312-80的规定，二级次常川汉字个数是 A.3000个 B. 7445个 C. 3008个 D. 3755个 24 ?关于存储器的存取速度快慢的比较中，是」E确的。 A.硬盘〉软盘〉RAM B.RAM〉硬盘〉软盘 C.软盘〉啖盘〉RAM D.换盘〉RAM>软盘 25?下列敘述中，错谋的一条是______ 。 A.CPU可以直接处理外部存储器中的数据 B.操作系统是计算机系统中最主要的系统软件 c. CPU可以直接处理内部存储器中的数据 I). -个汉字的机内码与它的国标码相弟8080H 26.编译程序的最终目标是。 A.发现源程序中的语法错误 B.改正源程序中的语法错误 C.将源程序编译成目标程序 D.将某一高级语言程序翻译成另一高级语言程序 27.汉字的区位码山一汉字的区号和位号组成。其区号和位号的范用各为_____ 。 A.区号1-95位号1-95 B.区号1-94位号1-94 C.区号0-94位号0-94 D.区号0-95位号0-95 28.计算机Z所以能按人们的意志H动进行工作，主要是因为采用了_____ O A.二进制数制 B.高速电子元件 C.存储程序控制 D.程序设计语言 29.多媒体计算机中除了通常计算机的硬件外，还必须包括____ 四个硬部件。 A.CD-ROM .音频卡、MODEM.音箱 B.CD-ROM、音频卡、视频卡、音箱 C.MODEM.音频卡、视频卡、音箱 D.CD-ROM > MODEM .视频卡.音箱 加工处理的数据或指令都是以 C.八进制码 D. B. 一组记录密度相同的同心D.二条阿基米德螺旋线
高级英语第二册第三课课文翻译对照(修订版)
第三课酒肆闲聊与标准英语 1人类的一切活动中，只有闲谈最宜于增进友谊，而且是人类特有的一种活动。动物之间的信息交流，不论其方式何等复杂，也是称不上交谈的。 2闲谈的引人人胜之处就在于它没有一个事先定好的话题。它时而迂回流淌，时而奔腾起伏，时而火花四射，时而热情洋溢，话题最终会扯到什么地方去谁也拿不准。要是有人觉得“有些话要说”，那定会大煞风景，使闲聊无趣。闲聊不是为了进行争论。闲聊中常常会有争论，不过其目的并不是为了说服对方。闲聊之中是不存在什么输赢胜负的。事实上，真正善于闲聊的人往往是随时准备让步的。也许他们偶然间会觉得该把自己最得意的奇闻轶事选出一件插进来讲一讲，但一转眼大家已谈到别处去了，插话的机会随之而失，他们也就听之任之。 3或许是由于我从小混迹于英国小酒馆的缘故吧，我觉得酒瞎里的闲聊别有韵味。酒馆里的朋友对别人的生活毫无了解，他们只是临时凑到一起来的，彼此并无深交。他们之中也许有人面临婚因破裂，或恋爱失败，或碰到别的什么不顺心的事儿，但别人根本不管这些。他们就像大仲马笔下的三个火枪手一样，虽然日夕相处，却从不过问彼此的私事，也不去揣摸别人内心的秘密。 4有一天晚上的情形正是这样。人们正漫无边际地东扯西拉，从最普通的凡人俗事谈到有关木星的科学趣闻。谈了半天也没有一个中心话题，事实上也不需要有一个中心话题。可突然间大伙儿的话题都集中到了一处，中心话题奇迹般地出现了。我记不起她那句话是在什么情况下说出来的——她显然不是预先想好把那句话带到酒馆里来说的，那也不是什么非说不可的要紧话——我只知道她那句话是随着大伙儿的话题十分自然地脱口而出的。 5“几天前，我听到一个人说…标准英语?这个词语是带贬义的批评用语，指的是人们应该尽量避免使用的英语。” 6此语一出，谈话立即热烈起来。有人赞成，也有人怒斥，还有人则不以为然。最后，当然少不了要像处理所有这种场合下的意见分歧一样，由大家说定次日一早去查证一下。于是，问题便解决了。不过，酒馆闲聊并不需要解决什么问题，大伙儿仍旧可以糊里糊涂地继续闲扯下去。 7告诉她“标准英语”应作那种解释的原来是个澳大利亚人。得悉此情，有些人便说起刻薄话来了，说什么囚犯的子孙这样说倒也不足为怪。这样，在五分钟内，大家便像到澳大利亚游览了一趟。在那样的社会里，“标准英语”自然是不受欢迎的。每当上流社会想给“规范英语”制订一些条条框框时，总会遭到下层人民的抵制。 8看看撒克逊农民与征服他们的诺曼底统治者之间的语言隔阂吧。于是话题又从19世纪的澳大利亚囚犯转到12世纪的英国农民。谁对谁错，并没有关系。闲聊依旧热火朝天。 9有人举出了一个人所共知，但仍值得提出来发人深思的例子。我们谈到饭桌上的肉食时用法语词，而谈到提供这些肉食的牲畜时则用盎格鲁一撒克逊词。猪圈里的活猪叫pig，饭桌上吃的猪肉便成了pork(来自法语pore)；地里放牧着的牛叫cattle，席上吃的牛肉则叫beef(来自法语boeuf)；Chicken用作肉食时变成poultry(来自法语poulet)；calf加工成肉则变成veal(来自法语vcau)。即便我们的菜单没有为了装洋耍派头而写成法语，我们所用的英语仍然是诺曼底式的英语。这一切向我们昭示了诺曼底人征服之后英国文化上所存在的深刻的阶级裂痕。 10撒克逊农民种地养畜，自己出产的肉自己却吃不起，全都送上了诺曼底